How old is someone born in 1999?
Subtract 1999 from 2026 to get 27. If the person's birthday has not happened yet this year, subtract one, making the age 26. A full birth date is needed for an exact result in years, months, and days.
Why two ages are shown
A birth year alone does not include the month and day. During 2026, everyone born in 1999 turns 27, but before that birthday they remain 26.
About generation labels
Generation Z is a commonly used label for people born in this period. Generation boundaries vary by source and are descriptive, not scientific or legal categories.